Constraining $f(R)$ gravity and evolving dark energy via large-scale structure and phase-space trajectories
We present a joint observational analysis confronting viable $f(R)$ modified gravity theories, specifically the Hu \&Sawicki and Starobinsky models, with background and large-scale structure (LSS) data. Utilizing Monte-Carlo Markov chain (MCMC) sampling across datasets including baryon acoustic oscillations (BAO), type...